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Question about the SN65HVD01

Kin Chan
Prodigy 30 points
Other Parts Discussed in Thread: SN65HVD01

Questions about the SN65HVD01 part:
1. Can it be used as a standard RS-422 transceiver?
2. Do you have a full-duplex version of it?
3. If ans of #2 is no, do you recommend someone to use two SN65HVD01 parts to form a full-duplex channel?
4. Can this part be run at 500kbps?


(The 1.8V I/O logic is needed to interface with the Xilinx V7 part. However, please also recommend other good full-duplex RS-422 transceivers, and the I/O can be level translating from1.8V I/O to other voltages. Thanks)

  • 0
    TI__Intellectual 905 points

    Hi Kin,

    first of, welcome to the e2e forum, I hope it will help you and you will find good answers here.

    To answer your questions:

    Kin Chan said:
    1. Can it be used as a standard RS-422 transceiver?

    Yes, the SN65HVD01 can be used as a RS-422 transceiver.

    Kin Chan said:
    2. Do you have a full-duplex version of it?

    No, unfortunatly TI offers that part only as half-duplex chip.

    Kin Chan said:
    3. If ans of #2 is no, do you recommend someone to use two SN65HVD01 parts to form a full-duplex channel?

    You can use two SN65HVD01's. I will try to find an alternative, but the 1.8V levels are quite limiting.

    Kin Chan said:
    4. Can this part be run at 500kbps?

    The SN65HVD01 can run at 500kbps. To do so, the SLR pin must be tied to GND.

    Kin Chan said:
    The 1.8V I/O logic is needed to interface with the Xilinx V7 part. However, please also recommend other good full-duplex RS-422 transceivers, and the I/O can be level translating from1.8V I/O to other voltages.

    I will look up an alternative for you tomorrow.

    Regards

  • 0 in reply to Till-Jonas Ostermann
    Prodigy 30 points

    Thanks for the reply.

  • 0 in reply to Till-Jonas Ostermann
    TI__Intellectual 905 points

    Unfortunatly, there is no integrated chip that offers the RS-485/422 full duplex capability and 1.8V input/output levels. Most 3.3V RS-485/422 transceivers have a logical input level threshold of 2V, so it is close, but still not possible.

    If you want a TI solution for your application, there are two ways:

    • use two SN65HVD01 chips, one for the driving, one for the recieving side
    • use a level shifter and a full duplex RS-485/422 transceiver fitting your needs

    Thats all i can suggest right now.

    Regards